MatSelectionList disabled input is only checked at creation time

[amandabot]

Bug, feature request, or proposal:

MatSelectionList's disabled input does not update child list option styles if it is changed.

What is the expected behavior?

Changing the disabled input should update the appearance of the list's items.

What is the current behavior?

List items retain their style.

What are the steps to reproduce?

https://stackblitz.com/edit/angular-x4tdc2

1. Select any item from the list
2. Click the button to toggle the disabled state of the selection list
3. Observe the styles of each item; they remain active
4. Click any item; the style toggles to the expected disabled style
5. Click the button to toggle the disabled state of the selection list
6. Click any item; the style toggles to the expected enabled style

What is the use-case or motivation for changing an existing behavior?

It's not clear whether disabled is meant to be a one-time setting or if it is meant to be dynamic. In the former case, the docs should be more clear about it; if it's the latter, the component does not behave as expected

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Angular 5.2.3
Material 5.2.0
TypeScript 2.6.2

Is there anything else we should know?

[amandabot]

I think this issue should be reopened as it hasn't been fully resolved with 5.2.2.

https://stackblitz.com/edit/angular-x4tdc2

If I select items from the list, then set the MatSelectionList disabled to true, those items are not styled as disabled:

Is disabled meant to be a one-time binding, or am I using it incorrectly in the example?

[devversion]

I agree, although it's not even released in 5.2.2, but in 6.0.0-beta.2. It's only partly resolved now. The list items can be still focused because I didn't address the tabIndex issue yet.

The runtime exceptions when using the list key manager are solved. though.

Related issue that should also fix the remaining parts of this issue: #9995